Nut-lock.



NUT LOCK.

(Application led Apr. 7, 1900.)

(No lllndl.)

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PATENT FRANK FREESE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO IIIM-SELF AND EMIL J. BA1-ILS, OF SAME PLACE.

NUTnLoCK.

SPECIFICATION forming part of Letters Patent NO. 653,228, dated July 10,1900.

Application led April 7, 1900.

T all whom it may concern:

Be it known that I, FRANK Fnnnsn, a citizen of the United States ofAmerica, residing in the city and county ofkPhiladelphia, in the Stateof Pennsylvania, have invented a certain new and Improved Nut-Lock, ofwhich the following is a true and exact description, reference being hadto the accompanying drawings, which form a part thereof.

My invention relates to devices for locking bolt-nuts, and has for itsobject to provide a nut-locking device at once simple and efficient.

The nature'of my invention will be best un` derstood as described inconnection with the drawings, in which it is illustrated, and in which iFigure l is a sectional view through a railway-rail, showing fish-platessecured to the rail by bolts and nuts and the nut locked in position bymy improved locking device. Fig. 2 is a sectional View through mynut-locking l washer, taken on the section-line 2 2 of Fig. 3.

Pig. 3 is a plan view of the Washer; and Fig.

et is a cross-sectional view through the washer, taken on thesectiondine 4 i of Fig. 3, the bolt, fish-plate, and nut beingrepresented in dotted lines.

A indicates the rail; B B, the fish-plates; C, the bolt, and D the nut,all of ordinary construction.

E indicates my improved nutf-locking washer, e e indicating the oppositefaces of the washer, and E an oblique perforation extending from face toface of the washer, as shown in Figs. 3 and 4.

F is a stud which may conveniently be made of steel WireA This stud isof less diameter than the perforation E and is centrally pivoted in saidperforation, preferably upon a projection E2 of the inner wall of theperforation, said projection being conveniently formed after the stud isinplace in the perforation by forcing in by means of a punch a portionof the inner Wall of the washer, as is indicated at e2, this punchingaction forcing a portion of the inner wall of the perforation (indicatedat ci) into the metal of the stud, as indicated at F3, Fig. A. The endsof the stud F are sharpened or pointed, preferably in serrations, asindicated at F and F2,

Serial No. 11,95 8. (No model.)

other extreme position have its sharp points lying substantially flushwith the faces of the washer.

Inoperation the washer is placed between the fish-plate and nut on the'bolt, as indicated in Fig. l, and as the nut is screwed down it movesover the sharp edges of the stud, pushing them down in the slot, so thatthey oer substantially no resistance to the movement of the nut.Immediately, however, on a reversal` of the direction of movement of thenut the threaded edges of the stud dig into the metal of the nut and ofthe fish-plate, eifectually preventing the unscrewing of the nut,whichindeed cannot ordinarily be accomplished without a complete disruptionof the washer.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A nut lock consisting of an annular washer having an obliqueperforation extending from face to face in combination with a studofless diameter than the perforation in the washer said stud beingcentrally pivoted in said perforation and having sharpened ends adaptedto project beyond or lie substantially iush'with the faces of the washeras the stud is oscillated on its pivot.

2. A nut lock consisting of an annular wash er having an obliqueperforation extending from face to face and at its center lying close tothe inner wall of the washer, in combination with a stud of lessdiameter than the perforation in the washer, said stud being cen trallypivoted in said perforation on aprojection from the inner wall of theperforation forced in from the inner wall of the washer and havingsharpened ends adapted to project beyond or lie substantially flush withthe faces of the washer as the stud is oscillated on its pivot.

Vtannin rennen.

Witnessesi JOHN S. GRrscoM, LnNnrrn MCFARLAND.

